<template>
  <div id="app">
    <div class="container">
      <!-- 顶部搜索框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody v-if="list.length>0">
          <tr v-for="(item) in list" :key="item.id">
            <td>{{item.id}}</td>
            <td>{{item.name}}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="item.price>100 ? 'red':'' ">{{item.price}}</td>
            <td>{{timer(item.time)}}</td>
            <td><a href="#" @click="del(item.id)">删除</a></td>
          </tr>
          <tr style="background-color: #eee">
            <td>统计:</td>
            <td colspan="2">总价钱为: {{total}}</td>
            <td colspan="2">平均价: {{avg}}</td>
          </tr>
        </tbody>
        <tfoot v-else>
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="资产名称" v-model.lazy="name" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="价格"  v-model.number="price" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button class="btn btn-primary" @click="add">添加资产</button>
      </form>
    </div>
  </div>
</template>

<script>
import dayjs from 'dayjs'
export default {
  data() {
    return{
      list:JSON.parse(localStorage.getItem('pin')),
        name:'',
        price:''
    }
  },
  methods:{
     timer(date){
      return dayjs(date).format('YYYY-MM-DD HH:mm:ss')
    },
    del(id){
      return this.list = this.list.filter(item => item.id !== id)
    },
    add(){
      this.list.push({
        id:+new Date(),
        name:this.name,
        price:this.price,
        time:new Date()
      })
    }
  },
  computed:{
    total(){
      return this.list.reduce((t,c)=> t+c.price,0)
    },
    avg(){
      return (this.total /this.list.length).toFixed(2)
    }
  },
  watch:{
    list(val){
 localStorage.setItem('pin',JSON.stringify(val))
    }
   
  }
};
</script>

<style>
.red {
  color: red;
}
</style>